Wonder Solder [ TRT-Wonder.com ] is a proprietary silver solder. Some cynics might say Wonder Solder got its name because the people that started the firm wondered if anyone was crazy enough to pay that much for solder.

Most audiophile silver solders range 2-5%. Some might agrue that Ersin SN62 (available at Radio Shack, although in thinner gauge, part #64-013) is identical, but without the cache.